23115523 has 16 divisors (see below), whose sum is σ = 24775200. Its totient is φ = 21530880.

The previous prime is 23115509. The next prime is 23115539. The reversal of 23115523 is 32551132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23115523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23115494 and 23115503.

It is not an unprimeable number, because it can be changed into a prime (23115503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129048 + ... + 129226.

It is an arithmetic number, because the mean of its divisors is an integer number (1548450).

Almost surely, 2^23115523 is an apocalyptic number.

23115523 is a deficient number, since it is larger than the sum of its proper divisors (1659677).

23115523 is a wasteful number, since it uses less digits than its factorization.

23115523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its digits is 900, while the sum is 22.

The square root of 23115523 is about 4807.8605429026. The cubic root of 23115523 is about 284.8620364362.

Adding to 23115523 its reverse (32551132), we get a palindrome (55666655).

The spelling of 23115523 in words is "twenty-three million, one hundred fifteen thousand, five hundred twenty-three".